stashcat vs OpenScape Mobile Pro
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
stashcat
A secure and GDPR-compliant communication platform for businesses, integrating chat functionalities with cloud storage. Facilitates efficient team coordination, file sharing, and appointment management. Offers a private and protected alternative to public messaging apps.
- Secure group and individual chats
- Integrated cloud file storage
- Channel-based organization
- Calendar module for appointments
- Survey module for polls
- GDPR compliant and secure hosting
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stashcat® - contemporary way of corporate communications - WhatsApp alternative for business and government. Efficient communication between all employees of a company is the basis for a target-oriented way of working. stashcat® combines the usual chat functionalities with your own cloud storage into a data protection compliant and secure communication platform - GDPR compliant. stashcat® offers a contemporary way of communication for companies and is subjected to a strict privacy policy. Communicate easily, quickly and securely within the company– with stashcat®. Organization via #Channels: With the # Channel function, you can easily and transparently chat in groups or teams and thus coordinate your in-house communication without great effort. Communication via single or group chats: You can quickly and easily interact with one or more users. This feature is not public and works like the latest generation of messenger apps. Own and shared file storage: Each user has a personal file storage in which documents and files can be stored, accessed and shared with other users at any time. Every #Channel and every chat has its own file storage. Calendar module: Appointments can be made privately or publicly, shared in channels with the ability to accept or cancel for members of the channel. Survey module: create appointment queries or evaluations in the question-answer-principle. Secure hosting and strict data protection in accordance with DIN ISO 27001: The operation of stashcat® is provided by various, redundant server systems. The user data are processed encrypted in a server center in Hannover and thus are treated according to German data protection law. Your app, our technology: Use stashcat® in your particular company layout and offer your employees and customers an effective way to communicate with each other, regardless of time and place.
OpenScape Mobile Pro
This app enhances mobile communications with VoIP and video capabilities, allowing seamless call transfers between devices and networks. It helps reduce cellular charges by routing calls over Wi-Fi.
- VoIP and Video calling
- Seamless call transfer
- Wi-Fi call routing
- User presence status
- Contact management
- Instant messaging (Beta)
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IMPORTANT NOTICE: OpenScape Mobile Pro is not a standalone client but part of a Unified Communications solution. In order to function correctly all mandatory solution components must be installed and in operational state. Be advised by your administrator before installing or upgrading the application. The solution requires an OpenScape UC applications server, an SBC server, a HAproxy, a mobile Façade server and a suitable PBX (OpenScape Voice or OpenScape 4000). Version compatibility matrix can be found in the product release notes. Today’s reality - A mobile, global, distributed and digital workplace. But you still need fast access to people, from wherever you are, at the lowest possible cost. OpenScape Mobile Pro enhances your communications experience with rich Voice over IP (VoIP) and Video capabilities from your iPhone or iPad. It also features iOS CallKit and PushKit support. Plus it allows you to seamlessly move calls between desk phone, Wi-Fi and cellular. OpenScape Mobile Pro reduces cellular charges through lower air-time minutes and roaming charges by making and receiving calls over Wi-Fi from your home, a Wi-Fi hotspot or on the corporate Wi-Fi. With a simple finger gesture, OpenScape Mobile’s call swipe lets you seamlessly move calls from your mobile device to a desktop device, and vice-versa, and from cellular network or the Wi-Fi. What you can do OpenScape Mobile Pro works in three modes (depending on the license you purchased): UC-only mode: Gives you access to OpenScape Unified Communications features (also see OpenScape UC) • Set your user presence status and preferred device or device list • Be reached on a single published phone number • See your OpenScape contacts and their presence status • Manage your OpenScape contacts and place calls to your contacts through your corporate network • Chat and send Instant Messages to other contacts (Beta) • Initiate ad-hoc conferences and join a conference, plus see the conference status • Utilize additional call control services (e.g. toggle, consultation, 3 party conference) • Activate rules and set time zone, location and status note • View missed calls in the Journal • Automatically import credentials from the OpenScape mobile client, if installed and configured Voice/Video-only mode: Gives you access to VoIP and Video, plus call transfer, call forwarding and call swipe. Combined mode: Gives you both UC and VoIP/Video functionality in a single mobile application.
Screenshots
Verdict
The clearest difference is rating: stashcat at 5.0 against OpenScape Mobile Pro's 1.0. stashcat also leads on review sentiment (50% vs 10%). OpenScape Mobile Pro's advantage is iOS requirement (15.0 vs 17.0). On price, ratings volume, update cadence and ads there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
stashcat holds the better App Store score, 5.0 against 1.0. Both are backed by a comparable volume of ratings — 2 and 2 respectively. Written reviews point the same way: 50% of stashcat's written reviews are positive against 10% of OpenScape Mobile Pro's.
Both ship on a similar rhythm, roughly fortnightly. Both last shipped on October 13, 2026.
| Parameter | stashcat | OpenScape Mobile Pro |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (2 ratings) — better | 1.0 (2 ratings) |
| Positive reviews | 50.0% of reviews — better | 10.0% of reviews |
| Number of ratings | 2 | 2 |
| Update frequency | Fortnightly | Fortnightly |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 17.0 | 15.0 — better |
| Further details — not scored | ||
| Size | 117 MB | 62 MB |
| Age rating | 4+ | 4+ |
| Developer | Stashcat GmbH | Unify Software and Solutions GmbH & Co.KG |
Customer experience
stashcat
OpenScape Mobile Pro
In-app purchases
stashcat
No in-app purchases
OpenScape Mobile Pro
No in-app purchases







